Claude Code /cd: Switch Directories, Preserve Prompt Cache, 3 Edge Cases (2026)

Claude Code /cd switches directories mid-session and keeps the prompt cache hot. Three edge cases break it: CLAUDE.md drift, MCP drift, /add-dir conflicts.

Claude Code Nested Sub-Agents: 5 Levels Deep, Token Math, 3 Pitfalls (2026)

Claude Code v2.1.172 lets sub-agents spawn sub-agents five levels deep. Token costs compound per branch, and three anti-patterns make the bill run away.

Claude Code Safe Mode: 5 Things Disabled + When to Use Over /clear (2026)

Claude Code v2.1.169 --safe-mode: 1 flag disables 5 layers (CLAUDE.md, plugins, skills, hooks, MCP). Differs from /clear (1-turn wipe).

Claude Fable 5 vs Opus 4.8 vs GPT-5.5: SWE-Bench, Pricing, When to Switch

Fable 5 hits 95.0% SWE-bench Verified and 80.3% SWE-bench Pro — 11 points over Opus 4.8, 21.7 over GPT-5.5. At $10/$50 it costs 2x Opus.

Codex AGENTS.md Not Loading in Symlinked Workspaces: v0.138 Fix (2026)

Codex CLI v0.138 finally loads AGENTS.md in symlinked and remote workspaces. Three verification steps, seven error patterns, and the monorepo fix.

Anthropic vs OpenAI Prompt Caching 2026: Cost Math + 3 Cache-Miss Fixes

Anthropic and OpenAI both price cache reads at 0.1x input, but writes and TTLs differ. Three cache-miss patterns and the cost math on 10M tokens a day.

Apple's Third-Generation Foundation Models: A Developer's Read on WWDC 2026

Apple's AFM 3 at WWDC 2026: five models, a 20B sparse on-device LLM, and Private Cloud Compute on NVIDIA GPUs. What is verified, what is spin.

Claude 529 overloaded: what to check before retrying

Claude 529 means temporary API overload. Check status, distinguish 429 limits, budget retries and handle incomplete streams without duplicating requests.

CC Switch Download & Install for Claude Code, Codex (v3.20.1)

Install CC Switch v3.20.1 to switch Claude Code, Codex, Gemini CLI and 4 more from one tray. Direct .msi, .dmg, .deb links, brew and npm CLI setup. Updated Sept 2026.

codex: command not found & EACCES on npm install -g @openai/codex

Fix codex: command not found and EACCES: permission denied after npm install -g @openai/codex. 7 fixes: PATH, npm prefix, NVM, Volta, sudo-owned dirs, Node 16+.